1. Healy DW, Maties O, Hovord D, Kheterpal S. A systematic review of the role of videolaryngoscopy in successful orotracheal intubation. BMC Anesthesiol. 2012;12:32.
2. Lewis SR, Butler AR, Parker J, et al. Videolaryngoscopy versus direct laryngoscopy for adult patients requiring tracheal intubation. Cochrane Database Syst Rev. 2016;11:CD011136.
3. Kwak HJ, Lee SY, Lee SY, et al. McGrath videolaryngoscopy facilitates routine nasotracheal intubation in patients undergoing oral and maxillofacial surgery: a comparison with Macintosh laryngoscopy. J Oral Maxillofac Surg. 2016;74:256–261.
4. Jones PM, Armstrong KP, Armstrong PM, et al. A comparison of GlideScope videolaryngoscopy to direct laryngoscopy for nasotracheal intubation. Anesth Analg. 2008;107:144–148.
5. Lili X, Zhiyong H, Jianjun S. A comparison of the GlideScope with the Macintosh laryngoscope for nasotracheal intubation in patients with ankylosing spondylitis. J Neurosurg Anesthesiol. 2014;26:27–31.
6. Kim HJ, Kim JT, Kim HS, et al. A comparison of GlideScope videolaryngoscopy and direct laryngoscopy for nasotracheal intubation in children. Paediatr Anaesth. 2011;21:417–421.
7. Hirabayashi Y, Hoshijima H, Kuratani N, Masaki E. [Efficacy of videolaryngoscopes for nasotracheal intubation: a meta-analysis of randomized controlled trials]. Masui. 2013;62:1375–1379.
8. Heuer JF, Heitmann S, Crozier TA, et al. A comparison between the GlideScope classic and GlideScope direct video laryngoscopes and direct laryngoscopy for nasotracheal intubation. J Clin Anesth. 2016;33:330–336.
9. Yumul R, Elvir-Lazo OL, White PF, et al. Comparison of three video laryngoscopy devices to direct laryngoscopy for intubating obese patients: a randomized controlled trials. J Clin Anesth. 2016;31:71–77.
10. Ander F, Magnuson A, Berggren L, et al. Time-to-intubation in obese patients. A randomized study comparing direct laryngoscopy and videolaryngoscopy in experienced anaesthetists. Minerva Anesthesiol. 2017; DOI: 10.23736/S0375-9393.17.11740-2.
11. Abdellatif AA, Ali MA. GlideScope videolaryngoscope versus flexible fiberoptic bronchoscope for awake intubation of morbidly obese patient with predicted difficult intubation. Middle East J Anaesthesiol. 2014;22:385–392.
12. Ranieri D Jr, Filho SM, Batista S, do Nascimento P Jr. Comparison of Macintosh and Airtraq laryngoscopes in obese patients placed in the ramped position. Anaesthesia. 2012;67:980–985.
13. Mushambi MC, Kinsella SM, Popat M, et al. Obstetric Anaesthetists' Association and Difficult Airway Society guidelines for the management of difficult and failed tracheal intubation in obstetrics. Anaesthesia. 2015;70:1286–1306.
14. Aziz MF, Kim D, Mako J, et al. A retrospective study of the performance of video laryngoscopy in an obstetric unit. Anesth Analg. 2012;115:904–906.
15. Arici S, Karaman S, Dogru S, et al. The McGrath series 5 video laryngoscope versus Macintosh laryngoscope: a randomized trial in obstetric patients. Turk J Med Sci. 2014;44:387–392.
16. Yi J, Gong Y, Quan X, Huang Y. Comparison of the Airtraq laryngoscope and the GlideScope for double-lumen tube intubation in patients with predicted normal airways: a prospective randomized trial. BMC Anestesiol. 2015;15:58.
17. Russell T, Slinger P, Roscoe A, et al. A randomised controlled trial comparing the Glidescope and the Macintosh laryngoscope for double-lumen endobronchial intubation. Anaesthesia. 2013;68:1253–1258.
18. Hsu HT, Chou SH, Wu PJ, et al. Comparison of the GlideScope videolaryngoscope and the Macintosh laryngoscope for double-lumen tube intubation. Anaesthesia. 2012;67:411–415.
19. Yao WL, Wan L, Xu H, et al. A comparison of the McGrath® Series 5 videolaryngoscope and Macintosh laryngoscope for double-lumen tracheal tube placement in patients with a good glottic view at direct laryngoscopy. Anaesthesia. 2015;70:810–817.
20. Suppan L, Tramer MR, Niquille M, et al. Alternative intubation techniques vs Macintosh laryngoscopy in patients with cervical spine immobilization: systematic review and meta-analysis of randomized controlled trials. Br J Anaesth. 2016;116:27–36.
21. Foulds LT, McGuire BE, Shippey BJ. A randomized cross-over trial comparing the McGrath series 5 videolaryngoscope with the Macintosh laryngoscope in patients with cervical spine immobilisation. Anaesthesia. 2016;71:437–442.
22. Sun Y, Lu Y, Huang Y, Jiang H. Pediatric video laryngoscope versus direct laryngoscope: a meta-analysis of randomized controlled trials. Paediatr Anaesth. 2014;24:1056–1065.
23. Vadi MG, Ghazal EA, Halverson B, Applegate RL. Comparison of indirect video laryngoscopes in children younger than two years of age: a randomized trainee evaluation study. Middle East J Anaesthesiol. 2016;23:401–410.
24. Kaufmann J, Laschat M, Hellmich M, Wappler F. A randomized controlled comparison of the Bonfils fiberscope and the GlideScope Cobalt AVL video laryngoscope for visualization of the larynx and intubation of the trachea in infants and small children with normal airways. Paediatr Anaesth. 2013;23:913–919.
25. Lee JH, Park YH, Byon HJ, et al. A comparative trial of the GlideScope® video laryngoscope to direct laryngoscope in children with difficult direct laryngoscopy and an evaluation of the effect of blade size. Anesth Analg. 2013;117:176–181.
26. Lingappan K, Arnold JL, Shaw TL, et al. Videolaryngoscopy versus direct laryngoscopy for tracheal intubation in neonates. Cochrane Database Syst Rev. 2015;2:CD009975.
27. Kleine-Brueggeney M, Greif R, Schoettker P, et al. Evaluation of six videolaryngoscopes in 720 patients with a simulated difficult airway: a multicentre randomized controlled trial. Br J Anaesth. 2016;116:670–679.
28. Griesdale DE, Liu D, McKinney J, Choi PT. GlideScope videolaryngoscopy versus direct laryngoscopy for endotracheal intubation: a systematic review and meta-analysis. Can J Anaesth. 2012;59:41–52.
29. Aziz MF, Abrons RO, Cattano D, et al. First-attempt intubation success of videolaryngoscopy in patients with anticipated difficult direct laryngoscopy: a multicenter randomized controlled trial comparing the C-MAC D-blade versus the GlideScope in a mixed provider and diverse patient population. Anesth Analg. 2016;122:740–750.
30. Brück S, Trautner H, Wolff A, et al. Comparison of the C-MAC® and GlideScope® videolaryngoscopes in patients with cervical spine disorders and immobilisation. Anaesthesia. 2015;70:160–165.
31. Arslan ZI, Alparslan V, Ozdal P, et al. Face-to-face tracheal intubation in adult patients: a comparison of the AirtraqTM, GlidescopeTM and FastrachTM devices. J Anesth. 2015;29:893–898.
32. Serocki G, Neumann T, Scharf E, et al. Indirect videolaryngoscopy with C-MAC D-Blade and GlideScope: a randomized, controlled comparison in patients with suspected difficult airways. Minerva Anestesiol. 2013;79:121–129.
33. Hoshijima H, Kuratani N, Hirabayashi Y, et al. Pentax Airway Scope vs Macintosh laryngoscope for tracheal intubation in adult patients: a systematic review and meta-analysis. Anaesthesia. 2014;69:911–918.
34. Kim MK, Park SW, Lee JW. Randomized comparison of the Pentax AirWay Scope and Macintosh laryngoscope for tracheal intubation in patients with obstructive sleep apnea. Br J Anaesth. 2013;111:662–666.
35. Suzuki A, Onodera Y, Mitamura SM, et al. Comparison of the Pentax-AWS airway scope with the Macintosh laryngoscope for nasotracheal intubation: a randomized, prospective study. J Clin Anesth. 2012;24:561–565.
36. Liu ZJ, Yi J, Guo WJ, et al. Comparison of McGrath series 3 and Macintosh laryngoscopes for tracheal intubation in patients with normal airway by inexperienced anesthetists. Medicine (Baltimore). 2016;95:e2514.
37. Taylor AM, Peck M, Launcelott S, et al. The McGrath series 5 videolaryngoscope vs the Macintosh laryngoscope: a randomised, controlled trial in patients with a simulated difficult airway. Anaesthesia. 2013;68:142–147.
38. Ng I, Hill AL, Williams DL, et al. Randomized controlled trial comparing the McGrath videolaryngoscope with the C-MAC videolaryngoscope in intubating adult patients with potential difficult airways. Br J Anaesth. 2012;109:439–443.
39. Ali QE, Das B, Amir SH, et al. Comparison of the Airtraq and McCoy laryngoscopes using a rigid neck collar in patients with simulated difficult laryngoscopy. J Clin Anesth. 2014;26:199–203.
40. Lange M, Frommer M, Redel A, et al. Comparison of the Glidescope and Airtraq optical laryngoscopes in patients undergoing direct microlaryngoscopy. Anaesthesia. 2009;64:323–328.
41. Maharaj CH, Costello JF, Harte BH, Laffey JG. Evaluation of the Airtraq and Macintosh laryngoscopes in patients at increased risk for difficult tracheal intubation. Anaesthesia. 2008;63:182–188.
42. Alvis BD, Hester D, Watson D, et al. Randomized controlled trial comparing the McGrath MAC video laryngoscope with the King Vision video laryngoscope in adult patients. Minerva Anestesiol. 2016;82:30–35.
43. Ali QE, Amir SH, Jamil S, Ahmad S. A comparative evaluation of the Airtraq and King Vision video laryngoscope as an intubating aid in adult patients. Acta Anaesthesiol Belg. 2015;66:81–85.
44. Valencia JA, Pimienta K, Cohen D, et al. A comparison of King Vision videolaryngoscopy and direct laryngoscopy as performed by residents: a randomized controlled trial. J Clin Anesth. 2016;35:571–575.
45. Bhat R, Sanickop CS, Patil MC, et al. Comparison of Macintosh laryngoscope and C-MAC video laryngoscope for intubation in lateral position. J Anaesthesiol Clin Pharmacol. 2015;31:226–229.
46. Apfelbaum JL, Hagberg CA, Caplan RA, et al.; American Society of Anesthesiologists Task Force on Management of the Difficult Airway. Practice guidelines for management of the difficult airway: an updated report by the American Society of Anesthesiologists task force on the management of difficult airway. Anesthesiology. 2013;118:251–270.
47. Law JA, Broemling N, Cooper RM, et al.; Canadian Airway Focus Group. The difficult airway with recommendations for management – part 1. Difficult tracheal intubation encountered in an unconscious/induced patient. Can J Anaesth. 2013;60:1089–1118.
48. Law JA, Broemling N, Cooper RM, et al.; Canadian Airway Focus Group. The difficult airway with recommendations for management – part 2. The anticipated difficult airway. Can J Anaesth. 2013;60:1119–1138.
49. Piepho T, Cavus E, Noppens R, et al. S1 guidelines on airway management. Guideline of the German Society of Anesthesiology and Intensive Care Medicine. Anaesthetist. 2015;64(Suppl 1):S27–S40.
50. Petrini F, Accorsi A, Adrario E, et al.; Gruppo di Studio SIAARTI „Vie Aeree Difficili“; IRC e SARNePI; Task Force. Recommendations for airway control and difficult airway management. Minerva Anestesiol. 2005;71:617–657.